B115 is a powerful active 2-way loudspeaker designed for small PA and portable sound systems requiring strong lows, high output, and clear performance. Its 15” low-frequency and 1.35” high-frequency drivers deliver extended bass and articulate mids for live music, DJ sets, and corporate events. Onboard DSP with FIR filtering ensures controlled response, while Bluetooth® 5.0, dual inputs, and line output allow flexible multi-speaker setups. The durable polypropylene cabinet with convection-cooled amplifier guarantees reliable, silent operation.
OVERVIEW
Montarbo B115: Professional Sound Anywhere
B115 is a professional active 2-way loudspeaker engineered for small PA, live performance, and mobile sound reinforcement applications where high SPL, extended low-frequency reproduction, and reliable portability are required. Featuring a 15” LF transducer with a 2.5” voice coil paired with a 1.35” HF driver, the system offers a frequency response from 50 Hz to 20 kHz and reaches a maximum SPL of 130 dB. A 90° × 60° dispersion pattern ensures controlled coverage for short-to-medium throw environments such as stages, dancefloors, event spaces, and club-style setups.
Using a hybrid Class D + A/B amplifier platform rated at 600 W RMS (1200 W peak), B115 delivers robust dynamic performance while maintaining convection-based silent cooling. DSP includes 28/56-bit internal processing with 24-bit / 48 kHz AD/DA conversion and FIR filtering for improved phase coherence. User controls include channel levels, main level, preset selection, input sensitivity, and LINK/MIX routing. Connectivity comprises CH1 Combo, CH2 XLR-F + 1/4” Jack, 3.5 mm AUX mini-jack, and an XLR-M line output for daisy-chain PA configurations. Bluetooth® 5.0 enables stereo wireless playback for multimedia and event use.
Constructed from polypropylene for durability and transport efficiency, the cabinet measures 430 × 725 × 405 mm and weighs 21.6 kg—suitable for pole-mounting, stage placement, and portable reinforcement. While primarily optimized for mobile PA applications, B115 can also be utilized in fixed installations requiring elevated SPL and extended low-frequency bandwidth.
FEATURES
Active 2-way loudspeaker for small PA and portable sound reinforcement
FIR-based DSP for increased clarity and phase precision
Bluetooth® 5.0 stereo for flexible multimedia playback
Rugged polypropylene cabinet suitable for portable and occasional installation use
TECHNICAL SHEET
Acustical Data
Speaker Type
2-way Active bass reflex
Frequency Response [-10 dB]
50 Hz – 20 kHz
Max SPL
130 dB
HF
1.35″ driver
LF
15″ – 2.5″ V.C.
Dispersion
90° H x 60° V
Crossover Frequency
1.8 kHz
Amplifier
Amp Class
D + A/B
RMS Power
600 W
Peak Power
1200 W
Cooling
Conventional
DSP
Advanced functions
FIR filters
DSP
28/56 Bit
AD/DA Converter
24Bit / 48kHz
Controls
Ch. levels
MAIN level
PRESET button
Channel sens. LINK/MIX selection
Connectors
CH1: Combo
CH2: XLR-F + jack 6,35mm (1/4”)
AUX IN: mini-jack 3,5mm
LINE OUT: XLR-M
Bluetooth ®
5.0 stereo
Enclosure
Dimensions
W x H x D
430 x 725 x 405 mm
[16.9” x 28.5” x 15.9”]
Weight
21.6 kg
[47.62 lb]
Cabinet
Polypropilene

APPLICATION
B115 excels in small PA environments that demand higher output capability, extended bass performance, and reliable portability. It performs effectively in live music venues, small clubs, rehearsal spaces, corporate events, and DJ applications where full-range coverage and strong low-end are essential elements of the system.
With controlled dispersion and onboard DSP, B115 integrates seamlessly into portable front-of-house systems, stage reinforcement setups, and mobile event rigs. Although primarily designed for portable PA work, it can also serve in fixed installations—such as multipurpose halls, event venues, and institutional facilities—where robust SPL and full-bandwidth coverage are required.
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